Sherkin nodded and made a welcoming gesture.
The senior expert began to flip through a briefcase filled with document bags, and Gao Yi noticed there must be at least a few hundred document bags in this briefcase.
These voiceprint maps should be more than enough!
At this moment, the sonar soldier's machine was ready.
He took out a record with a label on the box.
The recording on the record began to play.
The sound wasn't very loud, and no headphones were used, both sonar soldiers stood in front of the player. As soon as the sound came out, the younger sonar soldier immediately said, "MGK-400EM passive sonar, shallow water."
Gao Yi heard the sound; it wasn't noisy, and there was a faint bouncing noise.
"Los Angeles-class Nuclear Submarine!"
Both sonar soldiers spoke at the same time, they exchanged looks, nodded excitedly, and then said to Huang Haisheng: "No problem!"
